CVE-2026-1137

was · was Multiple Products

A high-severity vulnerability has been identified in multiple products from the vendor "was".

Executive summary

A high-severity vulnerability has been identified in multiple products from the vendor "was". This flaw could allow an unauthenticated remote attacker to execute arbitrary commands on affected devices, potentially leading to a complete system compromise. Organizations using the affected products are at significant risk of network intrusion, data theft, and further internal attacks.

Vulnerability

This vulnerability is a command injection flaw in the web management interface of the affected devices. An unauthenticated attacker can send a specially crafted HTTP request containing malicious commands to a vulnerable endpoint. The system fails to properly sanitize this input, causing the embedded commands to be executed on the underlying operating system with elevated privileges, likely as the root user.

Business impact

This vulnerability presents a significant risk to the organization, reflected by its High severity with a CVSS score of 8.8. Successful exploitation would grant an attacker full control over the network device, which often serves as a perimeter security gateway. This could lead to severe consequences, including the interception and redirection of network traffic, unauthorized access to internal network segments, deployment of malware, data exfiltration, and complete loss of device availability. A compromised network device can serve as a persistent foothold for an attacker to launch further attacks against critical internal assets.

Remediation

Immediate Action: Identify all vulnerable assets within the environment and apply the security updates released by the vendor immediately. Prioritize patching for devices with management interfaces exposed to the internet. After patching, monitor for any signs of post-patch exploitation attempts and review historical access logs for indicators of compromise preceding the update.

Proactive Monitoring: Security teams should monitor web server access logs on affected devices for unusual or malformed requests, particularly those containing shell metacharacters (e.g., ;, |, &&, $()). Monitor network traffic for unexpected outbound connections originating from the network devices, as this could indicate a successful compromise and communication with a command-and-control server.

Compensating Controls: If immediate patching is not feasible, restrict access to the device's web management interface to a secure, isolated management network. Ensure the interface is not exposed to the public internet. If external access is required, enforce multi-factor authentication and place the device behind a Web Application Firewall (WAF) with rules designed to block command injection attacks.

Exploitation status

Public Exploit Available: false

Analyst recommendation

This vulnerability should be treated as a critical priority. Due to the high CVSS score of 8.8 and the potential for complete remote system compromise without authentication, the risk of exploitation is severe. Although not currently listed on the CISA KEV, its characteristics make it a prime candidate for future inclusion. We strongly recommend that organizations apply the vendor-supplied patches immediately. If patching is delayed, the compensating controls, particularly restricting management interface access, must be implemented without delay to mitigate the immediate threat.